Question about Royal Guard's health pool calculation at start of battle under Lord Vader

Leadership should be first before uniques.

So for RG: 72833x1.3 = 94683+126664= 221346.
Then take 5% of LV. Can't really calculate that because you just gave an example of combined health and protection, but maybe you meant that was the combined after adding 30% health. So 16000. Now RG is at 237346. Doubled is 474692.